Several laptop users move between networks, domain, home, etc and when they attempt to access DFS shares explorer status is working offline. The issue only resolves it self after a reboot. Connecting directly to the share works and i am able to ping network resources. This behavior occurs for VPN users as well.
"slow-link mode". In win7 (with default settings) a client will enter slow-link mode if the latency to the server is above 80ms. In slow-link mode all writes are made to the local cache and a background sync only happens every 6 hours. Depending on your connection the default slow link detection speed is 64,000 bps
On client computers running Windows 7 or Windows Server 2008 R2, a shared folder automatically transitions to the slow-link mode if the round-trip latency of the network is greater than 80 milliseconds, or as configured by the "Configure slow-link mode" policy. After transitioning a folder to the slow-link mode, Offline Files synchronizes the user's files in the background at regular intervals, or as configured by the 'Configure Background Sync' policy. While in slow-link mode, Windows periodically checks the connection to the folder and brings the folder back online if network speeds improve.
If you do not configure the "Configure slow-link mode" policy setting, computers running Windows Vista or Windows Server 2008 will not transition a shared folder to the slow-link mode. Computers running Windows 7 or Windows Server 2008 R2 will use the default latency value of 80 milliseconds when transitioning a folder to the slow-link mode. To prevent computers running Windows 7 or Windows Server 2008 R2 from using the slow-link mode, disable this policy.
Option 1 Disable it in the Group policy to see if it helps (feedback welcome),
Check the following two policy settings that control the offline file slow-link mode and speed:
Path: Computer Policy\Administrative Templates\Network\Offline Files
*Configure slow-link mode
*Configure slow-link speed
Option 2 Configure Forced silent auto reconnection
1. Click Start, type REGEDIT in search bar, and then click OK.
2. Locate and click the following registry subkey:
3. Click Edit, point to New, and then click DWORD Value.
4. Type SilentForcedAutoReconnect, and then press ENTER to name the value.
5. Double-click SilentForcedAutoReconnect.
6. In the Value data box, type 1, and then click OK.
Option3 Computer Policy\Administrative Templates\Network\Offline Files\Action on server disconnect
Tip: To configure this setting without establishing a setting, in Windows Explorer, on the Tools menu, click Folder Options, click the Offline Files tab, click Advanced, and then select an option in the "When a network connection is lost" section.
Also, see the "Non-default server disconnect actions" setting.